feat(WHE-27): add drizzle db package and typed env config

packages/db/src/client.ts

@@ -0,0 +1,12 @@
+import postgres from 'postgres'
+import { drizzle } from 'drizzle-orm/postgres-js'
+
+import { env } from '@household/config'
+
+const queryClient = postgres(env.DATABASE_URL, {
+  prepare: false,
+  max: 5
+})
+
+export const db = drizzle(queryClient)
+export { queryClient }